Julius jonson



. UNITED STATES JULIUS JoNsoN, on NEW YORK, N. Y., ASSIGNOR OF ONE-HALFTO JULIUS ELSON, OF SAME PLACE.

ENGINE,

SPECIFICATION forming part of Letters Patent No. 402,086, dated April23, 1889.

Application filed February 24, 1888- Serial No. 265,149. (No model.)

To all whom it may concern L Be it known that I, J U'L'I s J ONSON, ofthe city and county of New York, in the State of New York, have inventeda new and useful larger area upon the latter side.

The invention will be hereinafter fully described with reference to thedrawings, and its novelty will be pointed out in a claim.

In the accompanying drawings, Figure 1 is a section of a double compoundengine embodying my invention, taken in a plane parallel with thecrank-shaft. Fig. 2 is a sectional elevation upon about the planeindicated by the dotted line y y, Fig. 1, which is transverse to thecrank-shaft, and through one of the two cylinders and pistons. Fig.3 isa sectional elevation of a portion of the other cylinder and piston,including,. also, the valve pertaining to such other cylinder. Fig. 4.-is a section of the two valves and the valvechest upon about the planeindicated by the dotted line z .2, Fig. 3,in a plane parallel with I thevalve-seats; and Fig. 5' is a transverse which are set at section of aportion of the cylinders, together with the two valves and valve-chestupon about the plane indicated by the dotted line Fig. 3.

Similar letters of reference designate corresponding parts-in all thefigures.

A designates the crank shaft, which is mounted to rotate in bearings a,and which is provided with two auger-handle cranks, a a pointssubstantially opposite each other. I Y

B B designate the two cylinders, and C C the two pistons which operatetherein, and each of which is constructed with a trunk, 0 workingthrough a stuffing-box, c, in the lower end of its cylinder. Thesetrunk-pistons are connected directly by rods D D with the two cranks a aand owing to the cranks being at" opposite points in the circle thepistons O 0 move simultaneously in .opposite directions, one pistonbeing at the upper end of the stroke when the other piston is at thelower end of its stroke.

As here represented, the working parts of the engine are inclosed in acasing, E, upon which the cylinders B B are supported, and whichincludes the bearings a for the crankshaft. The two trunk-pistons C Oare of equal size and weight, and consequently the weight of thesepistons is balanced upon the crank-shaft, and, if desired, the trunks Oof the pistons may be so proportioned that the pressure of steam uponthe trunk side of each piston, plus the force of the vacuum acting uponthe other side, if the enginebe condensing, will equal the pressure ofthat same steam when it is transferredto the opposite side of the pistonand acts upon the full area thereof. Therefore both the moving parts andthe pressures upon the two engines may be balanced and the pressure uponthe crank-shaft bearings will also be balanced, and consequently theengine may be run ata high speed.

I) b designate the two valve-seats, which are formed within thevalve-chest B and upon the seats I) I) work the two valves F F. Thesetwo valves F F are moved simultaneously in the same direction by asingle s'ystem of mechanism including but a single valve-rod, F As hererepresented, this single system of mechanism comprises one eccentric, F,and a single eccentric-rod, F c011- nected to the valve-rod, and, ashere shown, the two valves F F are formed in a single valve structure orcasting, as best shown in Figs. l and 5, and extreme simplicity in adouble engine is thus secured. Inasmuch as the two pistons O 0 movesimultaneously in reverse directions, the two systems of ports for thetwo cylinders and the construction of the two valves must be entirelydifferent from each other. 7

In Fig. 2 I have shown an arrangement of ports and a construction ofvalve suitable for the valve F and cylinder B, and in Fig. 3 I haveshown an arrangement of ports and a 0011- struction of valve suitablefor the cylinder 13 and valve F. The ports which are in the valve-seat bfor the cylinderB are as follows: e e are the two supply-ports andpassages which lead to opposite ends of the cylinder B, and these portse e are adjacent to each other, and beyond said ports is the exhaustporte In the valve F is formed a passage, f, and within the passage f, or inthe space inclosed by it and between its ends, is a supply-cove, f,which is open at the side of the valve to receive the steam, as shownclearly in Figs. 4 and 5. Beyond the'passagef and the supply-cove f isthe exhaust-cove f In this example of the invention the valve structureis moving in the direction indicated by the arrows in Figs, 2, 3, and 4,and the piston O is at the upper end of its stroke, while the piston Gis at the lower end of its stroke. As the valve F moves upward, the endsof its passage f come into coincidence with the two supply-ports e e,and consequently the steam which is below the piston C is exhaustedthrough the port 6, through the passage f, and through the port 6 intothe cylinderB on the opposite side of the piston and forces said pistondownward. After the piston C has completed its downward stroke, andduring the time that it is making its upward stroke, the port 6 is incommunication with the supply-cove f of the valve F and the ports 8 eare in communication through the exhaustcove f of the valve, and at thistime steam is admitted from the valve-chest through the Supply-cove fand port 6 under the trunk side of the piston, and simultaneously thesteam above or on the opposite side of the piston is exhausted throughthe port 6, the exhaustcove f of the valve, and the exhaust-port 6 Theseat I) and the cylinder B, to which it pertains, have the supply-portse leading to opposite ends of the cylinder B, and the eX- hal lst-port 6intermediate between said ports e e The valve F is adouble D-valve, or,in other words, has a passage, f, for steam, and an exhaust-cove, fwhereby the port 6 may be placed in communication with the exhaustport 6The piston C is at the bottom of its cylinder, and the valve F is movingupward at the same time that the cylinder commences its movement upward.

In the position of parts shown in Fig. 3 the receiving-edge f of thevalve is just about to uncover the supply-port e to the steam in thevalve-chest B and at the same time the exhaust-cove f is just about toplace the port 6 and the exhaust-port e in communication. By such officeof the valve live steam is received to the cylinder B below the piston 0and the steam above the piston is exhausted through the port c, saidcove f and exhaustport 6 After the piston C has reached the upper end ofits stroke the valve F will move downward to place the ports 6 e incommunication through the passage f, and the steam from below or on thetrunk side of the piston will be transferred through the port e, passagef, and port e to the upper side of sald piston C, and will produce thedownward stroke of the piston.

It will be understood that in speaking of a single system of mechanism,including a single valve-rod for operating the valve structure F F, Idesire to include either a single eccentric and eccentric-rod, as hereshown, or the well-known reversing-gear consisting of a link and twoeccentrics and eccentric-rods. In either case there Will be but a singlevalverod for operating the two valves, and either arrangement ofeccentrics maybe considered as a single system of mechanism for operating the valve-rods. Therefore by my invention I produce a double enginein which the weight of the pistons is balanced upon the crank-shaft, andin the case of a double compound condensing engine the pressure of steamupon the lower or trunk side of each piston, plus the force exerted bythe vacuum on the other side of that piston, may be balanced by thedownward pressure upon the opposite side of the other piston. So, also,in a compound non-conden singengine the trunks may be so proportionedthat the pressure of steam on the trunk side of each piston will balancethe pressure on the opposite side of the other piston.

What I claim as my invention, and desire to secure by Letters Patent,is-

The combination, with the cylinder and trunk-piston of a compoundengine, the cylinder having a valve-seat in which are the supply-ports e6, adjacent to each other, and the exhaust-port 6 beyond saidsupply-ports, of a valve having the passage f, whereby the twosupply-ports may be placed in communication, and having between the endsof said passage a supply-cove, f, opening at the side of the valve, andalso having beyond said passage the separate exhaust-cove fsubstantially as herein described.

JULIUS J ONSON.

Witnesses:

O. HALL, FREDK. HAYNES.

